Ectoparasitic infections, such as scabies and animal mite infestations, may occur in large seasonal clusters, such as in Pittsburg, Kansas, in August 2004, when 300 residents sought immediate medical care for intensely pruritic, erythematous, papular rashes that were subsequently determined to be caused by multiple bites from European itch mites (Peymotes herfsi) (Figure 1).

In a bedroom, however, a dehumidifier will not prevent body moisture under a sleeper from raising the relative humidity in a mattress to 80 percent, a level conducive to mite infestations (and even mold) if sustained.

He first discusses the pathological conditions caused by arthropods (allergies, stings, bites, dermal conditions, and myiasis) and the principles of their treatment, including a chapter on delusions of insect and mite infestations.

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